Jam color mainly in the following three cases: tannins contained in the raw material, flower pigments occur under the action of enzymes, oxygen oxidation discoloration; some of the ingredients in the raw material and the metal ions to form a colored substance discoloration; heat treatment processing time Improper control, caramel effect occurs, the Maillard reaction and cause discoloration. Measures to prevent discoloration of fruit jam as follows:

       1, easy to change the fruit peeled, diced, should be quickly immersed in dilute hydrochloric acid or salt mixture or protecting color, or add antioxidants (such as vitamin C), and heated to destroy the enzyme activity as soon as possible.

       2, the process to prevent contact with iron, copper and other metals; dark fruit, such as strawberries, bayberry, etc., shall not use plain cans.

       3, machining processes to quickly prevent heating and concentrated for too long, especially after reaching the end of enrichment, must quickly pan canning, sealing, sterilizing and cooling to prevent the backlog.

       4, canned storage temperature should not be too high to 20 ℃ is appropriate.

        Dongguan City is Connaught Packaging Co., Ltd. is located in Dongguan City, Guangdong Province, on the verge of Guangzhou, Shenzhen and other coastal city, convenient transportation, is a specialized production of iron and aluminum easy-open lid of the enterprise. The company has three major product series: beverage EOE, aluminum and tinplate EOE EOE safe side, but for a variety of cans, aluminum cans, composite cans and PET cans. Consulting and order hotline: 0769-28686423 / 13266285888